code: def terminate_instance(
      self,
      instance_id: str,
      region: str,
      backend_data: Optional[str] = None,
  ):
      self.api_client.delete_instance(instance_id)
  
file_path: dstack/src/dstack/_internal/core/backends/datacrunch/compute.py
imports: from typing import Dict, List, Optional
  from dstack._internal.core.backends.base import Compute
  from dstack._internal.core.backends.base.compute import get_shim_commands
  from dstack._internal.core.backends.base.offers import get_catalog_offers
  from dstack._internal.core.backends.datacrunch.api_client import DataCrunchAPIClient
  from dstack._internal.core.backends.datacrunch.config import DataCrunchConfig
  from dstack._internal.core.errors import BackendError
  from dstack._internal.core.models.backends.base import BackendType
  from dstack._internal.core.models.instances import InstanceAvailability, InstanceOffer, InstanceOfferWithAvailability, InstanceState, LaunchedInstanceInfo
  from dstack._internal.core.models.runs import Job, Requirements, Run
label_desc: Use image node_id 6 for calling the DataCrunchCompute obj's underlying member method code with example usage: obj.terminate_instance(instance_id, region, backend_data) without return types